I had unprotected sex 3 days before my period, I did take plan b and my period came like the next day on the day expected. however, I've noticed that my period was unusual. usually it's heavy, and I have bad cramps. this time, it was light I had no cramps or any of my other usual symptons, and it was longer than usual. I've also experienced a couple early pregnancy symptons, like headaches, insomnia, sensitivity to smell..but maybe it's just paranoia. I have a feeling my next period will be late. is it a possibility I could be pregnant? I know it's too early to take a test.